A day will come in which men will look upon an animal's murder the same way they look today upon a man's murder.

When you are alone you are all your own.

Necessity is a guardian in Nature.

Marriage is like putting your hand into a bag of snakes in the hope of pulling out an eel.

You don't get into trouble because of the things you don't know. It is the things you don't know you don't know that really get you into a mess.

One day the world will look upon research upon animals as it now looks upon research on human beings.

Many have made a trade of delusions and false miracles, deceiving the stupid multitudes.